青海中华羊茅生长发育节律的研究

STUDY OF THE GROWTH RHYTHM OF FESTUCA SINENSIS KENG CV QINGHAI

研究表明：在高寒地区种植青海中华羊茅生育期110～115d，第二至第四年产草量和种籽产量较稳定，第五年开始下降。地上部分产量前期增长缓慢，后期增长迅速，抽穗至开花期，是中华羊茅地上产量形成的关键时期；地下部分的产量前期增长迅速，后期缓慢，地下根系的增重与地上恰成相反趋势。在青海中华羊茅茎叶比中叶和花序占30．65％；开花期粗蛋白质和粗脂肪含量最高，是刈割牧草的最适时期。

Research showed that planted the Festuca Sinensis Keng cv Qinghai in alpine region , It＇s growing period is 110-115 days. From the second to the fourth annual yield of grass andseeds yield are relatively stable, and the fifth year begin to decline. Its yield in early stage increasing slow and rapid growth in the late stage in overground part , with heading to flowering, is the critical period of its overgroud yield formation. Its yield in early stage rapid increasing and that, slow growth in the late stage in the underground part .Its weight incre- ment of underground roots and overground roots just as the opposite trend. The leaves and inflorescences of Fes- tuca Sinensis Keng cv QingHai accounted for 30.7%, in its flowering period the crude protein and crude fat content highest levels ,is the most timely mowing grass.